The reaction S 8 ( g ) → 4 S 2 ( g ) has Δ H ° = +237 kJ (a) The S 8 molecule has eight sulfur atoms arranged in a ring. What is the hybridization and geometry around each sulfur atom in S 8 ? (b) The average S- S bond dissociation energy is 225 kJ/mol. Using the value of Δ H ° given above, what is the S=S double bond energy in S 2 (g)? (c) Assuming that the bonding in S 2 is similar to the bonding in O 2 , give a molecular orbital description of the bonding in S 2 . Is S 2 likely to be paramagnetic or diamagnetic?
The reaction S 8 ( g ) → 4 S 2 ( g ) has Δ H ° = +237 kJ (a) The S 8 molecule has eight sulfur atoms arranged in a ring. What is the hybridization and geometry around each sulfur atom in S 8 ? (b) The average S- S bond dissociation energy is 225 kJ/mol. Using the value of Δ H ° given above, what is the S=S double bond energy in S 2 (g)? (c) Assuming that the bonding in S 2 is similar to the bonding in O 2 , give a molecular orbital description of the bonding in S 2 . Is S 2 likely to be paramagnetic or diamagnetic?
The reaction
S
8
(
g
)
→
4
S
2
(
g
)
has
Δ
H
°
= +237 kJ
(a) The S8 molecule has eight sulfur atoms arranged in a ring. What is the hybridization and geometry around each sulfur atom in S8?
(b) The average S-S bond dissociation energy is 225 kJ/mol. Using the value of
Δ
H
°
given above, what is the S=S double bond energy in S2(g)?
(c) Assuming that the bonding in S2 is similar to the bonding in O2, give a molecular orbital description of the bonding in S2. Is S2 likely to be paramagnetic or diamagnetic?
Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell